Preheat Oven:
Preheat your oven to 350°F (175°C). Grease a baking dish with butter or non-stick spray.

Make the Cream Cheese Mixture:
In a mixing bowl, combine softened cream cheese, melted butter, sugar, and vanilla extract. Stir until smooth and well combined. Spread this mixture evenly in the bottom of your prepared baking dish.

Add the Cake Mix:
Sprinkle the dry lemon cake mix evenly over the cream cheese mixture. Do not stir; let the cake mix sit on top.

Bake:
Bake for 40-45 minutes, or until the top is golden and bubbly. The cake will form a golden crust, and the cream cheese layer will be deliciously gooey.

Serve:
Allow the cake to cool for a few minutes before serving. Enjoy this lemony treat on its own or topped with whipped cream or ice cream!